How to connect labview to proteus in order to send commands to AVR micro controller, is there any helpful link or source code ?
I heard about VISA can you help me with some example or source code ?
I don't know about anything specific to the AVR, but LabVIEW's Example Finder has many examples on performing Serial communication ("Help -> Find Examples.." then search for Serial). If you know the protocol then you can use the examples to create eh necessary Read and Write commands.
Also a quick search in Google for "Labview AVR" had this as the top most hit:
